277 lines
No EOL
9.2 KiB
Python
277 lines
No EOL
9.2 KiB
Python
import logging
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import daemon
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import argparse
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import os
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import requests
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import re
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import json
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import shutil
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from docker import Client, APIError
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from tempfile import TemporaryFile, mkdtemp
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from zipfile import ZipFile
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from data.queue import dockerfile_build_queue
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from data import model
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from workers.worker import Worker
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from app import app
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root_logger = logging.getLogger('')
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root_logger.setLevel(logging.DEBUG)
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FORMAT = '%(asctime)-15s - %(levelname)s - %(pathname)s - %(funcName)s - %(message)s'
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formatter = logging.Formatter(FORMAT)
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logger = logging.getLogger(__name__)
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class DockerfileBuildWorker(Worker):
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def __init__(self, *vargs, **kwargs):
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super(DockerfileBuildWorker, self).__init__(*vargs, **kwargs)
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self._mime_processors = {
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'application/zip': DockerfileBuildWorker.__prepare_zip,
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'text/plain': DockerfileBuildWorker.__prepare_dockerfile,
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'application/octet-stream': DockerfileBuildWorker.__prepare_dockerfile,
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}
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@staticmethod
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def __count_steps(dockerfile_path):
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with open(dockerfile_path, 'r') as dockerfileobj:
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steps = 0
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for line in dockerfileobj.readlines():
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stripped = line.strip()
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if stripped and stripped[0] is not '#':
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steps += 1
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return steps
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@staticmethod
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def __prepare_zip(request_file):
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build_dir = mkdtemp(prefix='docker-build-')
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# Save the zip file to temp somewhere
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with TemporaryFile() as zip_file:
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zip_file.write(request_file.content)
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to_extract = ZipFile(zip_file)
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to_extract.extractall(build_dir)
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return build_dir
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@staticmethod
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def __prepare_dockerfile(request_file):
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build_dir = mkdtemp(prefix='docker-build-')
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dockerfile_path = os.path.join(build_dir, "Dockerfile")
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with open(dockerfile_path, 'w') as dockerfile:
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dockerfile.write(request_file.content)
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return build_dir
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@staticmethod
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def __total_completion(statuses, total_images):
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percentage_with_sizes = float(len(statuses.values()))/total_images
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sent_bytes = sum([status[u'current'] for status in statuses.values()])
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total_bytes = sum([status[u'total'] for status in statuses.values()])
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return float(sent_bytes)/total_bytes*percentage_with_sizes
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@staticmethod
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def __build_image(build_dir, tag_name, num_steps, result_object):
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try:
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logger.debug('Starting build.')
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docker_cl = Client(timeout=1200)
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result_object['status'] = 'building'
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build_status = docker_cl.build(path=build_dir, tag=tag_name, stream=True)
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current_step = 0
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built_image = None
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for status in build_status:
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# logger.debug('Status: %s', str(status))
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step_increment = re.search(r'Step ([0-9]+) :', status)
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if step_increment:
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current_step = int(step_increment.group(1))
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logger.debug('Step now: %s/%s' % (current_step, num_steps))
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result_object['current_command'] = current_step
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continue
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complete = re.match(r'Successfully built ([a-z0-9]+)$', status)
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if complete:
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built_image = complete.group(1)
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logger.debug('Final image ID is: %s' % built_image)
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continue
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shutil.rmtree(build_dir)
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# Get the image count
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if not built_image:
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result_object['status'] = 'error'
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result_object['message'] = 'Unable to build dockerfile.'
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return
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return built_image
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except Exception as exc:
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logger.exception('Exception when processing request.')
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result_object['status'] = 'error'
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result_object['message'] = str(exc.message)
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@staticmethod
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def __push_image(built_image, token, tag_name, result_object):
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try:
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# Login to the registry
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host = re.match(r'([a-z0-9.:]+)/.+/.+$', tag_name)
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if not host:
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raise Exception('Invalid tag name: %s' % tag_name)
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registry_endpoint = 'http://%s/v1/' % host.group(1)
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docker_cl = Client(timeout=1200)
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logger.debug('Attempting login to registry: %s' % registry_endpoint)
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docker_cl.login('$token', token, registry=registry_endpoint)
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history = json.loads(docker_cl.history(built_image))
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num_images = len(history)
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result_object['total_images'] = num_images
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result_object['status'] = 'pushing'
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logger.debug('Pushing to tag name: %s' % tag_name)
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resp = docker_cl.push(tag_name, stream=True)
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for status_str in resp:
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status = json.loads(status_str)
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logger.debug('Status: %s', status_str)
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if u'status' in status:
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status_msg = status[u'status']
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if status_msg == 'Pushing':
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if u'progressDetail' in status and u'id' in status:
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image_id = status[u'id']
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detail = status[u'progressDetail']
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if u'current' in detail and 'total' in detail:
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images = result_object['image_completion']
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images[image_id] = detail
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result_object['push_completion'] = \
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DockerfileBuildWorker.__total_completion(images, num_images)
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elif u'errorDetail' in status:
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result_object['status'] = 'error'
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if u'message' in status[u'errorDetail']:
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result_object['message'] = str(status[u'errorDetail'][u'message'])
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return
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result_object['status'] = 'complete'
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except Exception as exc:
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logger.exception('Exception when processing request.')
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result_object['status'] = 'error'
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result_object['message'] = str(exc.message)
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@staticmethod
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def __cleanup():
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docker_cl = Client(timeout=1200)
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# First clean up any containers that might be holding the images
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for running in docker_cl.containers(quiet=True):
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docker_cl.kill(running['Id'])
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# Next, remove all of the containers (which should all now be killed)
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for container in docker_cl.containers(all=True, quiet=True):
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docker_cl.remove_container(container['Id'])
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# Iterate all of the images and remove the ones that the public registry
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# doesn't know about, this should preserve base images.
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images_to_remove = set()
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repos = set()
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for image in docker_cl.images():
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images_to_remove.add(image['Id'])
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repos.add(image['Repository'])
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for repo in repos:
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repo_url = 'https://index.docker.io/v1/repositories/%s/images' % repo
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repo_info = requests.get(repo_url)
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if repo_info.status_code / 100 == 2:
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for repo_image in repo_info.json():
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if repo_image['id'] in images_to_remove:
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logger.debug('Image was deemed public: %s' % repo_image['id'])
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images_to_remove.remove(repo_image['id'])
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for to_remove in images_to_remove:
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logger.debug('Removing private image: %s' % to_remove)
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try:
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docker_cl.remove_image(to_remove)
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except APIError:
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# Sometimes an upstream image removed this one
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pass
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# Verify that our images were actually removed
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for image in docker_cl.images():
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if image['Id'] in images_to_remove:
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raise RuntimeError('Image was not removed: %s' % image['Id'])
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def process_queue_item(self, job_details):
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repository_build = model.get_repository_build(job_details['build_id'])
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user_files = app.config['USERFILES']
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resource_url = user_files.get_file_url(repository_build.resource_key)
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tag_name = repository_build.tag
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access_token = repository_build.access_token.code
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feedback = {
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'total_commands': None,
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'current_command': None,
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'push_completion': 0.0,
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'status': 'waiting',
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'message': None,
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'image_completion': {},
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}
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logger.debug('Starting job with resource url: %s tag: %s and token: %s' %
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(resource_url, tag_name, access_token))
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docker_resource = requests.get(resource_url)
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c_type = docker_resource.headers['content-type']
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logger.info('Request to build file of type: %s with tag: %s' %
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(c_type, tag_name))
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if c_type not in self._mime_processors:
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raise Exception('Invalid dockerfile content type: %s' % c_type)
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build_dir = self._mime_processors[c_type](docker_resource)
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dockerfile_path = os.path.join(build_dir, "Dockerfile")
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num_steps = DockerfileBuildWorker.__count_steps(dockerfile_path)
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logger.debug('Dockerfile had %s steps' % num_steps)
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built_image = DockerfileBuildWorker.__build_image(build_dir, tag_name,
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num_steps, feedback)
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DockerfileBuildWorker.__push_image(built_image, access_token, tag_name,
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feedback)
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DockerfileBuildWorker.__cleanup()
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desc = 'Worker daemon to monitor dockerfile build'
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parser = argparse.ArgumentParser(description=desc)
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parser.add_argument('-D', action='store_true', default=False,
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help='Run the worker in daemon mode.')
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parser.add_argument('--log', default='dockerfilebuild.log',
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help='Specify the log file for the worker as a daemon.')
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args = parser.parse_args()
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worker = DockerfileBuildWorker(dockerfile_build_queue)
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if args.D:
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handler = logging.FileHandler(args.log)
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handler.setFormatter(formatter)
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root_logger.addHandler(handler)
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with daemon.DaemonContext(files_preserve=[handler.stream]):
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worker.start()
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else:
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handler = logging.StreamHandler()
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handler.setFormatter(formatter)
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root_logger.addHandler(handler)
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worker.start() |